Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study of Methane Oxidation over Transition Metal (TM)/CeO2 (TM=Ni, Co, Cu, Fe)

전이금속이 담지된 세리아의 메탄 산화 반응에 대한 연구

  • Ahn, Ki-Yong (High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology) ;
  • Chung, Yong-Chae (Department of Materials Science and Engineering, Hanyang University) ;
  • Lee, Jong-Ho (High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology)
  • 안기용 (한국과학기술연구원, 고온에너지재료연구단) ;
  • 정용재 (한양대학교 신소재공학과) ;
  • 이종호 (한국과학기술연구원, 고온에너지재료연구단)
  • Received : 2012.07.30
  • Accepted : 2012.08.24
  • Published : 2012.08.31
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Abstract

The properties of methane oxidation were studied in this research over transition metal containing $CeO_2$ (TM/$CeO_2$, TM=Ni, Co, Cu, Fe) with TM content of 5 wt. % at atmospheric pressure. The characteristics of catalysts were investigated by various characterization techniques, including XRD, GC, SEM and EPMA analyses. The catalytic tests were carried out in a fixed Rmix ratio of 1.5 ($CH_4/O_2$) in a fixed-bed reactor operating isothermally at atmospheric pressure. Only the Ni/$CeO_2$ catalysts showed syngas production above $400^{\circ}C$ via typical partial oxidation reaction whereas other catalysts induced complete oxidation resulting in the production of $CO_2$ and $H_2O$ in whole reaction temperature range. From the quantitative analysis on carbon deposition after catalytic tests, Cu/$CeO_2$ was found to show the highest resistance on carbon deposition. Therefore Cu can be proposed as an efficient catalyst element which can be combined with a conventional Ni-based SOFC anode to enhance the carbon tolerance.

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References

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